I've finished the story mode on normal and I'm starting to do so on Heroic. I also planned to buy a Level Up Bundle as well. But before I do that, I have to ask: What is there to do in this game?
I know normal is the easiest version of the story mode, but even then the enemies don't seem like there get any tougher to beat in other modes. On top of that, if we're to get better heroes from summoning, wouldn't that just make things even easier than before? I've seen trigger teams just own event boss content and plan on making one of those types of squads.
Basically what I'm asking is what is there to do outside of the story, PvP, upgrading heroes and random events that would warrant staying around for the long haul?